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SHAREHOLDERS' EQUITY AND EMPLOYEE BENEFIT PLANS (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Aug. 07, 2019 | May 20, 2019 | Feb. 28, 2019 | Dec. 12, 2018 | Sep. 28, 2019 | Sep. 29, 2018 | Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Dividends declared (in usd per share) | $ 0.12 | $ 0.12 | $ 0.12 | $ 0.12 | $ 0.48 | $ 0.24 | $ 0
Description Of Maximum Percentage Of Employee Contributions and Matching Contributions Based Upon Years Of Service |  |  |  |  | employee contributions and matching Company contributions from 4% to 6% |  |
Relative Total Shareholder Return Average Stock Price Calculation Period |  |  |  |  | 90 days |  |
Total Shareholder Return Award Performance Measurement Period |  |  |  |  | 3 years |  |
Proceeds from Stock Options Exercised |  |  |  |  | $ 14 | $ 55 | $ 509
Minimum [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Defined Contribution Plan, Employer Matching Contribution, Percent |  |  |  |  | 4.00% |  |
Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage |  |  |  |  | 0.00% |  |
Maximum [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Defined Contribution Plan, Employer Matching Contribution, Percent |  |  |  |  | 6.00% |  |
Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage |  |  |  |  | 200.00% |  |
Equity Incentive Plan 2009 [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant |  |  |  |  | 4.0 |  |
Non Employee Director [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Grant of common shares, upon initial election to board, value |  |  |  |  | $ 120 |  |
Grant of common shares, upon initial election to board, quarterly, value |  |  |  |  | $ 37 |  |

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